What's happening here is that the democrat party and its lap dogs in the media are throwing a temper tantrum because middle america rejected the idea that they should bend over and take it - it being post modernism, multi culturalism, open borders, a brobdingnagian and ever more intrusive welfare state - for their own good.
I think you pointed out some core problems (which dwarf health, education and unemployment problems) that the current administration will have a hard time undoing. In many ways the multiculturalism project has arguably contributed the most significant divide in our society; not to mention UK and Europe. Multiculturalism an idea that emerged from the left/liberal vision under the superficiality of "people of all races, religions and cultures should be equal in the eyes of the law", had in reality a very different agenda. Now it seems quite noble in that it would stand to mean defense of individual rights, freedom from conformity and tolerance. Instead, multiculturalism became a key, yet another agenda to expand the power and control of the state. On the one side it has promoted all kinds of conformity — conformity in ideas, actions and speech - through indoctrination of children, students, teachers, academia, employees, managers and executives on what’s politically correct speech and thought.
On the other side, rather than working as a response to diversity it has become a means of constraining it. That is through the state apparatus diversity has been institutionalized by putting people into ethnic and cultural boxes—into a singular, homogeneous Muslim or Black or Gay community, for example—and defining their needs and rights accordingly. For example that my identity is drawn on religious lines and so specific policies are drawn to cater to my muslim needs, while emphasizing such homogeneous identities as a key to entitlement. Such policies, in other words, have helped create the very divisions they were meant to overcome, and so a major reason why we stand so divided.
Yet we should be well aware that integration (of immigrants or of indigenous groups) has almost never happened because of the actions of the state. It has happened because of the work of civil society movements, by the individual bonds that people formed with one another, and by the "communitarian" organizations they establish to further their shared political and social interests. Rather what has been happening is the very erosion of such bonds and organizations through state sponsored organizations (e.g. black lives matter) that explains why social divide is a feature not simply of ethnic and immigrant communities, but of the wider society here, as well.
Perhaps the current administration to devolve some power might trigger a positive response, but I am not seeing any concerted and coherent proposals.